In the case of both the Big MOSFETS pair, and the Small MOSFETS pair, you take power from the PSU to them via their respective power input connectors. ​

In the case of both the Big MOSFETS pair, and the Small MOSFETS pair, you take power from the PSU to them via their respective power input connectors. ​

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There is an alternative however. For each pair, you can use jumpers ( one jumper for the small MOSFETS pair ( **JP28** ), two parralel ​jumpers for the two big MOSFETS pair ( **JP11** and **JP27** ) ). If you solder the pins for those OR connect a [[http://​www.computerhope.com/​jargon/​j/​jumper.htm|jumper]] to those pins, closing the circuit to VBB ( the stepper motors power input ), allowing you to take the power from those MOSFETS from the same place as the stepper motors do.

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There is an alternative however. For each pair, you can use jumpers ( one jumper for the small MOSFETS pair ( **JP28** ), two parallel ​jumpers for the two big MOSFETS pair ( **JP11** and **JP27** ) ). If you solder the pins for those OR connect a [[http://​www.computerhope.com/​jargon/​j/​jumper.htm|jumper]] to those pins, closing the circuit to VBB ( the stepper motors power input ), allowing you to take the power from those MOSFETS from the same place as the stepper motors do.

In the case of the big MOSFETS, you have to solder and put in place two jumpers, in parallel, in order to handle more current. ​

In the case of the big MOSFETS, you have to solder and put in place two jumpers, in parallel, in order to handle more current. ​